Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Knoxville to Portugal from $294

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Portugal departing on 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Knoxville to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
5:18 pm - 3:10 pm
TYS
-
LIS
16h 52m
2 stops
Delta Logo
5:00 am - 8:40 pm
LIS
-
TYS
20h 40m
2 stops
$739Delta
Sun, Nov 1 - Wed, Nov 18
American Airlines Logo
7:38 am - 9:05 am
TYS
-
LIS
20h 27m
1 stop
American Airlines Logo
6:30 am - 7:33 pm
LIS
-
TYS
18h 03m
2 stops
$779American Airlines
Sun, Nov 1 - Wed, Nov 18
Multiple Airlines Logo
7:13 pm - 6:10 pm
TYS
-
LIS
17h 57m
2 stops
Multiple Airlines Logo
6:35 am - 11:59 pm
LIS
-
TYS
22h 24m
2 stops
$816Multiple Airlines
Thu, Oct 15 - Wed, Oct 21
American Airlines Logo
7:38 am - 9:05 am
TYS
-
LIS
20h 27m
1 stop
American Airlines Logo
11:05 am - 9:04 pm
LIS
-
TYS
14h 59m
1 stop
$825American Airlines
Sun, Nov 1 - Wed, Nov 18
United Airlines Logo
9:45 am - 10:30 am
TYS
-
LIS
19h 45m
1 stop
United Airlines Logo
5:05 am - 9:00 pm
LIS
-
TYS
20h 55m
2 stops
$839United Airlines
Thu, Oct 15 - Wed, Oct 21
British Airways Logo
6:00 am - 9:05 am
TYS
-
LIS
22h 05m
1 stop
British Airways Logo
11:05 am - 8:18 pm
LIS
-
TYS
14h 13m
1 stop
$860British Airways
Thu, Oct 15 - Wed, Oct 21
Multiple Airlines Logo
9:45 am - 9:20 am
TYS
-
LIS
18h 35m
3 stops
Multiple Airlines Logo
1:00 pm - 9:45 am
LIS
-
TYS
25h 45m
2 stops
$870Multiple Airlines
Thu, Oct 15 - Wed, Oct 21
United Airlines Logo
7:25 pm - 9:20 am
TYS
-
LIS
32h 55m
2 stops
United Airlines Logo
6:45 am - 9:00 pm
LIS
-
TYS
43h 15m
2 stops
$878United Airlines
Sat, Oct 3 - Sun, Oct 11
KLM Logo
7:41 pm - 8:25 pm
TYS
-
FAO
19h 44m
2 stops
KLM Logo
9:45 pm - 3:30 pm
FAO
-
TYS
22h 45m
2 stops
$934KLM
Mon, Aug 17 - Mon, Aug 24
KLM Logo
6:12 pm - 6:05 pm
TYS
-
FNC
18h 53m
2 stops
KLM Logo
10:05 am - 5:19 pm
FNC
-
TYS
36h 14m
2 stops
$1,044KLM
Thu, Aug 20 - Thu, Aug 27

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Delta flights from Knoxville to Portugal

Our best Delta deals on Knoxville to Portugal flight tickets
Delta
Nov 1
TYS5:18 pmKnoxville McGhee Tyson
16h 52m
2 stops
LIS3:10 pmLisbon Humberto Delgado
Nov 18
LIS5:00 amLisbon Humberto Delgado
20h 40m
2 stops
TYS8:40 pmKnoxville McGhee Tyson
$739
Delta
Aug 16
TYS4:38 pmKnoxville McGhee Tyson
20h 12m
2 stops
LIS5:50 pmLisbon Humberto Delgado
Aug 23
LIS5:00 amLisbon Humberto Delgado
23h 00m
2 stops
TYS11:00 pmKnoxville McGhee Tyson
$972
Delta
Jul 21
TYS11:57 amKnoxville McGhee Tyson
18h 18m
2 stops
LIS11:15 amLisbon Humberto Delgado
Jul 28
LIS5:00 amLisbon Humberto Delgado
17h 55m
2 stops
TYS5:55 pmKnoxville McGhee Tyson
$1,167

American Airlines flights from Knoxville to Portugal

Our best American Airlines deals on Knoxville to Portugal flight tickets
American Airlines
Nov 1
TYS7:38 amKnoxville McGhee Tyson
20h 27m
1 stop
LIS9:05 amLisbon Humberto Delgado
Nov 18
LIS6:30 amLisbon Humberto Delgado
18h 03m
2 stops
TYS7:33 pmKnoxville McGhee Tyson
$779
American Airlines
Nov 1
TYS7:38 amKnoxville McGhee Tyson
20h 27m
1 stop
LIS9:05 amLisbon Humberto Delgado
Nov 18
LIS11:05 amLisbon Humberto Delgado
14h 59m
1 stop
TYS9:04 pmKnoxville McGhee Tyson
$825
American Airlines
Jul 8
TYS6:10 pmKnoxville McGhee Tyson
15h 00m
2 stops
LIS2:10 pmLisbon Humberto Delgado
Jul 16
LIS11:05 amLisbon Humberto Delgado
13h 55m
1 stop
TYS8:00 pmKnoxville McGhee Tyson
$1,170

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated July 7, 2026.
Use the filters below to find and compare flights from Knoxville to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sun 11/1

5:18 pm-3:10 pm

2 stops16h 52m

Lisbon Humberto Delgado

Wed 11/18

5:00 am-8:40 pm

2 stops20h 40m

$739

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sun 11/1

7:38 am-9:05 am

1 stop20h 27m

Lisbon Humberto Delgado

Wed 11/18

6:30 am-7:33 pm

2 stops18h 03m

$779

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Thu 10/15

7:13 pm-6:10 pm

2 stops17h 57m

Lisbon Humberto Delgado

Wed 10/21

6:35 am-11:59 pm

2 stops22h 24m

$816
Quickest round-trip

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sun 11/1

7:38 am-9:05 am

1 stop20h 27m

Lisbon Humberto Delgado

Wed 11/18

11:05 am-9:04 pm

1 stop14h 59m

$825

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Thu 10/15

9:45 am-10:30 am

1 stop19h 45m

Lisbon Humberto Delgado

Wed 10/21

5:05 am-9:00 pm

2 stops20h 55m

$839

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Thu 10/15

6:00 am-9:05 am

1 stop22h 05m

Lisbon Humberto Delgado

Wed 10/21

11:05 am-8:18 pm

1 stop14h 13m

$860

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Thu 10/15

9:45 am-9:20 am

3 stops18h 35m

Lisbon Humberto Delgado

Wed 10/21

1:00 pm-9:45 am

2 stops25h 45m

$870

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 10/3

7:25 pm-9:20 am

2 stops32h 55m

Lisbon Humberto Delgado

Sun 10/11

6:45 am-9:00 pm

2 stops43h 15m

$878

KnoxvilleFaro

TYS - FAO

TYSFAO

Knoxville McGhee Tyson

Mon 8/17

7:41 pm-8:25 pm

2 stops19h 44m

Faro

Mon 8/24

9:45 pm-3:30 pm

2 stops22h 45m

$934

KnoxvilleFunchal

TYS - FNC

TYSFNC

Knoxville McGhee Tyson

Thu 8/20

6:12 pm-6:05 pm

2 stops18h 53m

Funchal Madeira

Thu 8/27

10:05 am-5:19 pm

2 stops36h 14m

$1,044

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Portugal from

How to get the cheapest flight ticket from Knoxville to Portugal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Knoxville is in December. Flight prices, which tend to average around $475, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of December, then book flights to Portugal from Knoxville during January instead. Flights to Portugal in January, while not as cheap as those in December, still average around $477.

Can stopping save me money on Knoxville to Portugal flights?

You could potentially save up to 50% on your flight if you consider stops on a Knoxville to Portugal flight.

Cheap Knoxville to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Portugal

Fastest flight time

16h 52m

Direct flights

None
The fastest flight from Knoxville to Portugal takes 16h 52m
There are no direct flights from Knoxville to Portugal. There are no popular flight routes from Knoxville to Portugal.
Search flight deals

Frequently asked questions about flying from Knoxville to Portugal

  • When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Portugal?

    Prices for flights from Knoxville McGhee Tyson Airport to Portugal were last updated today.

  • How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Portugal?

  • How old do you have to be to fly from Knoxville McGhee Tyson Airport to Portugal?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The travel and health documents required for your trip to Portugal can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Portugal. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Knoxville to Portugal

Compare and see reviews for airlines that fly from Knoxville to Portugal with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $475Free CancellationRating
6.7
8,099 reviews
Search British Airways flights
United AirlinesPriceFrom $629Free CancellationRating
7.4
9,945 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to Portugal?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Knoxville to Portugal. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Knoxville to Portugal with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Knoxville to Portugal flights to just show those with flexible booking policies.

How can momondo help me find flights from Knoxville to Portugal?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Portugal from Knoxville.

I’m not ready to book a flight from Knoxville to Portugal right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Knoxville to Portugal flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Portugal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 8/6
Thu 8/13
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo
Flights to Lisbonfrom $533
Flights to Portofrom $534
Flights to Funchalfrom $566
Flights to Farofrom $578
Flights to Ponta Delgadafrom $569
Flights to Lajesfrom $585
Flights to Hortafrom $752
Flights to Pico Islandfrom $730
Flights to Porto Santofrom $670
Flights to Velasfrom $580